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Finding the Fourth Proportional to 913.46, 1,368.25 and 881.49

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Solution

The fourth proportional to 913.46, 1,368.25 and 881.49 is: 1,320.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.46 : 1,368.25 = 881.49 : x
  2. Step 2: Convert to fraction form
    913.46/1,368.25 = 881.49/x
  3. Step 3: Cross multiply
    913.46x = 1,368.25 × 881.49
  4. Step 4: Simplify right side
    913.46x = 1,206,096.49
  5. Step 5: Solve for x
    x = 1,206,096.49/913.46
  6. Step 6: Final answer
    x = 1,320.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.